Will tech firms challenge China's 'open' internet?

China has been smart and ruthless in its control of the internet within its borders. China is ramping up its investment in how the web works; artificial intelligence, big data and cloud computing. Which is why the social network is pushing very hard to try to get into China, legally. It's made him China's best known businessman, and he has a very direct message for the foreign firms who want in. As Tim Cook from Apple proved, when he appeared here in person, to praise China's vision of online "Openness".